Experiences with Sculpt VC
guido at witmond.nl
Tue Dec 18 00:27:55 CET 2018
I've been playing with Sculpt VC again. Doing so thought me a lot more
This time I succeeded in creating a VM with partitions on two SATA
disks. It runs Nixos inside with the /home partition on an encrypted ZFS
mirror. (and the root partition on a virtual disk, just like the Debian VM).
When I want to start the VM and the ahci-1.part_blk is not running, the
Runtime manager reports with a diagnostic stating vm-nixos needs
ahci-1.part_blk. To start my vm, I inspect a different partition on that
disk. That starts the part_blk and Runtime starts my VM.
So far so good. The problems start here:
1. When the VM runs and I stop inspecting that partition, the Runtime
manager kills my VM.
The manager was happy to start my VM when the resource came available
but does not keep the part_blk alive when the inspector stops.
2. When the VM runs (and has a session to the part_blk for that
partition, I can format that partition from the Storage component. I get
data corruption errors in ZFS on that disk. (But ZFS lives on and
repairs it from the other mirror).
That seems to be in violation of The Book para 4.5.8:
"""The part-block component requests a single block session,
parses a partition table,
and hands out each partition as a separate block session to its
There can be one client for each partition.
I would expect that the formatter would get an error because it should
not get a session to that partition.
Could someone shine a light on what's going on?
The log file is here: https://paste.wtmnd.nl/xfNMa3yY
I wrote a full write-up of my sculpting here:
https://paste.wtmnd.nl/WKUQowg2 -- I intend to make it a blog post for
others to learn from, hence the writing style.
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